Submersible pump

ABSTRACT

A submersible electric motor-pump assembly having a connection pedestal disposed between the pump outlet and the discharge pipe. The connection pedestal serving as a foot for a guide element and as an abuttment for the delivery outlet of the pump. The inlet opening of the discharge pipe is connected on the side of the connection pedestal opposite to the side the delivery outlet of the pump abuts against.

United States Patent 1191 Blum May 14, 1974 SUBMERSIBLE PUMP 3,659,964 I5/1972 Dahlgren 417/360 [7 6] Inventor: Albert Blum, Scheiderhoehe,FOREIGN PATENTS 0R APPLICATIQNS Lohmar Germany 246,575 4/1966 Austria417 360 [22] Filed: Nov. 30, 1971 ['21] p No 203 305 PrimaryExaminer-Carlton R. Croyle [30] Foreign Application Priority Data Nov.30, 1970 Germany 2058737 [52] U.S. Cl. 417/360 [51] Int. Cl. F04b 39/12[58] Field of Search 417/360, 361; 277/178, 277/206 R [56] ReferencesCited UNITED STATES PATENTS 3,427,982 2/1969 Englesson 417/360 3,656,8714/1972 Carlsson 417/361 Assistant Examiner-Richard J. Sher Attorney,Agent, or Firm-Lilling & Siegel [57] ABSTRACT livery outlet of the pumpabuts against.

3 Claims, 2 Drawing Figures SUBMERSIBLE PUMP BACKGROUND OF THE INVENTIONThis invention relates to an arrangement of the kind (herein called -thekind defined) including an electric motor-pump assembly which issubmersible in a waste water sump orother liquid-container and which isguided during lowering into position by guide elements co-operating withguide means and of which the delivery connection piece in its loweredposition is connectable with the inlet of a delivery conduit.

In the prior art, the known pump assembly arrange-- ments of the kinddefined there is, for example, secured to the bottom of theliquid-container a pipe bend provided with a foot. On the one hand thispipe bend provided with a foot serves for the connection of the deliveryconduit, and on the other hand it serves as an abutment for the deliveryoutlet piece of the pump to be connected therewith, which pump in alowered position, for example under the influence of its own weight,

can rest against the pipe bend. Moreover usuallythere are provided onthe pipe bend means for receiving the lower end of the guide means,which during lowering of the pump guide it'with its delivery outletpiece into the complementary position relative to the inlet of the pipebend.

Therefore this pipe bend with the foot must be included during thesupplying of such pump assembly arrangements. Thus there is involved abulky and heavy item which not only raises the transport costs but alsomust be continuously kept in stock by the manufacturer. The invention istherefore primarily intended to provide the possibility that theprovision of a special pipe bend provided with a foot becomessuperfluous and instead thereof permits the utilization of acommercially conventional pipe bend with standardized connection meansand which moreover makes it possible to use such conventionalconstructions of the pump assembly as are provided for stationaryinstallations.

SUMMARY OF THE INVENTION- According to the invention there is providedan arrangement of the kind defined, characterised by a connectionpedestal which can be secured in position in the liquid-container andwhich is provided with a passage opening for the liquid being pumped,which pedestal serves as a foot for the guide means and also serves asan abutment for the delivery outlet piece of the pump, and to whichconnection pedestal moreover the inlet part of the delivery conduit canbe connected securely at the side lying opposite to the delivery outletpiece of the pump.

The pipe bend may, for example, be a commercially conventional article.

As an important component on the connection pedestal there may beprovided a connection plate to which on one side the pipe bend of thedelivery conduit may be attached by flanges, while the opposite side canbe connected to the delivery outlet piece of the pump. If as guide meansfor the pump assembly there are employed commercially conventional tubeswith circular cross-section, this connection plate may carry at itsupper edge boss-like means for receiving the lower ends of the tubeswhich may be pushed without noticeable free play over those bosses andthen, for example, may be secured by a fastening pin.

- In order to make it possible to avoid the use of special pumpconstructions which are provided with guide elements for sliding on theguide means during the movement, and to make it possible to employconventional commercial pump constructions, whereby again the stockholding is simplified, the invention further provides in a submersiblepump assembly arrangement of the kind defined that, especially inconnection with the above-described connection plate, the deliveryoutlet piece of the pump is provided with a flange-like intermediateconnection piece which carries the guiding elements by which the pumpassembly is guided upon the guide means. This intermediate connectionpiece of the pump which serves as a counter flange for the connectionplate can at the same time be extended in order to achieve a securesealing between the pump and the delivery conduit, in that it isconstructed as a holder for a seal. In relation thereto there has provedto be suitable an annular seal which has a U-shaped profile incross-section and which grips the inner margin of the intermediateconnection piece attached to the pump, whereby one limb of the ring ofU-shaped cross-section formed as a sealing ring lies between theintermediate connection piece and the pump delivery outlet piece, andthe oppositely lying annular part of the seal effects the sealingbetween the intermediate connection piece and the connection plate.

In this way it is possible to avoid special constructions as heretoforeusual for the submersible pump assembly which is lowerable into thecontainer and with supplementary means to obtaina simpler and cheapercomplete arrangement with parts of normal construction.

The invention permits manifold possibilities of construction.

BRIEF DESCRIPTION OF THE DRAWING The scope of the monopoly sought isdefined in the claims hereinafter and how the invention may be put intopractice is described with reference to the accompanying drawing inwhich FIG. 1 shows in vertical section the lower end of a guide tubewith the adjoining connection parts of a pump and delivery conduit, and

FIG. 2 shows a view towards the connection side thereof with the pipebend removed.

DESCRIPTION OF THE PREFERRED EMBODIMENT In the example of embodimentillustrated in the drawings there is fastened upon the bottom of acontainer (not illustrated) a foot 11 which is secured by means of thescrews with nuts 12 indicated in FIG. 2. This foot 11 carries an uprightstanding connection plate 13 which is braced against the foot 11 bymeans of strengthening webs 14, 15 and 16. The connection plate 13 isprovided with a passage opening 131 which is surrounded on both sides byprotuberant annular surfaces 132 and 133. By means of screws and withthe interpositioning of an annular seal 17 a connecting flange 181 issecured against the annular surface 132, the flange 181 being on a pipebend 18 of which the second flange 182 can be connected with a deliveryconduit (not shown) loading upwardly. Against the other annular surface133 in the lowered condition the delivery outlet piece 19 of the pumpassembly presses with its seal 21 held by an intermediate connectionpiece 20.

The intermediate connection piece is secured to the flange 191 of thedelivery outlet piece 19 of the pump assembly by means of screws (notshown) and has at its inner periphery an opening which accommodates theseal 21. The seal 21 has a U-shaped crosssection and grips around theinner periphery of the intermediate connection piece 20, a washer-shapedpart 211 of this seal 21 being clamped between the delivery outletflange 191 and the intermediate connection piece 20. Thus not only isthe seal 21 held in its position but also there is achieved a goodsealing between the pump delivery outlet piece 19 and the intermediateconnection piece 20. The further washer-shaped part 212 of the seal 21lies against the free side of the intermediate connection 20 and uponpressing of the pumpagainst the connection plate 13 lies against theannular surface 133 thereof so that there also there is achieved a goodsealing.

The connection plate 13 at its upper edge carries a locating boss 22 forthe lower end of a guide tube 23 which serves for the guiding of thepump assembly during lowering and raising. The end of the guide tube canbe secured upon the locating boss 22 by a fastening pin (not shown).Around this guide tube 23 as a guide element there engages a guidecollar 24 which rests upon the intermediate connection piece 20 and hasan aligning slit 241 which widens conically downwards. During loweringthis locating slit 241 of the guide collar 24 slides, while the pumpassembly is only roughly located with reference to the connection plate13, upon a locating rail 25 secured to the upper margin of theconnection plate 13, which rail 25 locates the flange-like intermediateconnection piece 20 exactly in relation to the likewise flange-likeconnection plate 13 and guides the two parts into the correct relativepositions. At the end of the guide tube 23 the guide collar 24 strikesagainst an abutment piece 26 which carries the aligning rail 25. Underthe influence of the weight of the pump assembly the pump deliveryoutlet piece 19 bears against the connection plate 13 and thus creates atight seal here.

What l claim is:

1. A submersible electrical motor-pump assembly, having a drive motor, apump with a delivery outlet connected therewith, and a conventionaltubular guide element, the assembly being lowerable into a body of fluidwith the outlet of the pump being guided by the tubular guide elementinto a complementary position for fluid flow connection'with an inletopening ofa discharge pipe; the assembly comprising in addition: aconnection pedestal disposed between said pump delivery outlet and saidinlet opening of said discharge pipe, a flange-like connection plate, onthe pedestal, connected to the delivery outlet and to the inlet opening,thus providing a passage opening for the fluid to be pumped; a boss-likelocating means, attached to the upper edge of the connection plate, foraligning and setting thereupon the lower end of said tubular guideelement; means securing said guide element to said locating means; aflange-like intermediate connection element, on the delivery outlet,comprising a guide sleeve adapted to be in sliding engagement with saidguide element; said connection pedestal serving as a foot for the guideelement and as an abutment for the delivery outlet of said pump, and theinlet opening of said discharge pipe being connected on the side of saidconnection pedestal, opposite to the side said delivery outlet abutsagainst.

2. The submersible electric motor-pump assembly according to claim 1,wherein said intermediate connection element forms a counter flange forsaid flangelike connection plate and is provided with means serving toretain a seal between said flange-like connection plate and saidintermediate connection element.

3. The submersible electric motor-pump assembly according to claim 2wherein said seal forms an annular U-shaped seal having opposite legs,one of said legs providing a seal between said intermediate connectionelement and the delivery outlet of said pump, and the other of said legsproviding a seal between said intermediate connection element and saidconnection plate.

1. A submersible electrical motor-pump assembly, having a drive motor, apump with a delivery outlet connected therewith, and a conventionaltubular guide element, the assembly being lowerable into a body of fluidwith the outlet of the pump being guided by the tubular guide elementinto a complementary position for fluid flow connection with an inletopening of a discharge pipe; the assembly comprising in addition: aconnection pedestal disposed between said pump delivery outlet and saidinlet opening of said discharge pipe, a flange-like connection plate, onthe pedestal, connected to the delivery outlet and to the inlet opening,thus providing a passage opening for the fluid to be pumped; a bosslikelocating means, attached to the upper edge of the connection plate, foraligning and setting thereupon the lower end of said tubular guideelement; means securing said guide element to said locating means; aflange-like intermediate connection element, on the delivery outlet,comprising a guide sleeve adapted to be in sliding engagement with saidguide element; said connection pedestal serving as a foot for the guideelement and as an abutment for the delivery outlet of said pump, and theinlet opening of said discharge pipe being connected on the side of saidconnection pedestal, opposite to the side said delivery outlet abutsagainst.
 2. The submersible electric motor-pump assembly according toclaim 1, wherein said intermediate connection element forms a counterflange for said flange-like connection plate and is provided with meansserving to retain a seal between said flange-like connection plate andsaid intermediate connection element.
 3. The submersible electricmotor-pump assembly according to claim 2 wherein said seal forms anannular U-shaped seal having opposite legs, one of said legs providing aseal between said intermediate connection element and the deliveryoutlet of said pump, and the other of said legs providing a seal betweensaid intermediate connection element and said connection plate.